Centrifugal drier



Juhe 8, 1926.

G. R. DAVIS CENTRIFUGAL DRIER Filed Oct. 25. 1924 2 Sheets-Sheet 1 Vie/729.5595:

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in: kid/ 04y fitnessels: I a a I Patented June 8, 1926.

res PATENT OFFICE.

' GEORGE R. DAVIS, 01 CLEVELAND, OHIO.

GEHTBIFUGAL DIR'IEB.

Application filed October 25, 1924. Serial No. 745,816.

This invention relates to c entrifugal 'driers and more particularly to means for operating the discharge valve in the baskets of cen-.

'trifugal'driers, and has for its object the 5 provlsion of improved power means for operating such valves.

Heretofore the dischargeugal driers of tion pertains, has generally valve of centrifthe class .to which this invenbeen hand operated and considerable. labor has been necessary the dried material.

at times to open it, due to packing of The present invention provides a fluid operated cylinder which is "c onnected to the valve so as to open and close the same when fluid is admitted to the cylinder.

In the drawings, Figure 1 is a vertical sectional elevation through a drier embodying this invention.

Figure 2 is a plan view thereof.

the letter A deslgna stand, as

- drier, which stand consists L bell shaped valve 12 is provided with and u wardly base member 2 and spaced I re 3 is a fragmentary sectional view on the line III -III of Figure 1. Referring more particularly. to

the draw tes the housing known form of generally of a s1de members 3 and 4. An engine 5 is mounted on the base 2 for furnishing the power to operate the drier.

The forward ends of side members 3 and 4 are joined and support a suitable bearing 6 for the spindle or centrifugal shaft 7 which supports the perforated drier basket 8 at its lower end. The basket 8 is mounted within an imperforate stationary casing 9 adapted thrown off by The bottom wall 10' of to catch or intercept the fluid the centrifugal basket 8.

the basket 8' is provided with a centrally arranged dlscharge opening 11 adapted closed by a low tubular stem'13 and is spindle or shaft and have a vertical slidin said shaft to open to be normally bell'shaped valve or closure 12. The

a holmounted on the 7 so as to rotate therewith g movement on and close the opening 11.

The upper end of the stem 13 is provided with a pair of spaced collars or flanges 15 between which a yoke 16 is'loosely mounted. The yoke 16 is provided with a rearwardly offset connecting arm '17 adapte' to extend above theupper edge of the casing 9 when the ermost or closed p.os1t1on.'

valve 12 is in its low- A connecting or upper faces or the combined inlet and ily apparent.

operating rod 18 has its lower end secured to the arm 17 and its upper end secured to der 20.

The cylinder 20 is disposed verticall between the sidemembers 3 and 4 of the ousing A and is supported at its lower end by a cross brace 21 extending between the members 3 and 4 and at its upper end b braces 22 and 23 which extend upwardly rom the 4 to the upper end of the cylinder.

A suitable guide bar 25 is arranged vertically at the rear, of the rod 18 and its upper end secured to the cross brace 21, while its lower end is secured to the members 3 and 4 of the housing7 A. The rear end of the connecting arm 1 is provided with a roller 27 adapted to engage the. guide bar 25 so as to steady and guide the yoke 16 durin its vertical travel.

Fluid is adapted to be supplied to the cylinder 20othrough a supply pipe 28 which connects through a four-Way valve 29 with exhaust pipes 30 and 31 leading to the opposite ends of the cylinder. i

In order to prevent sudden jarrin of the operating mec anism and valve, if t e fluid should be exhausted from-the cylinder 20 suddenly, I provide cushion springs 32 and flanges of the members 3 and' 33 at the opposite ends of the cylinder against which the piston 19 will strike.

The operation of this device will be read- When it is desired to lift the valve 12 to discharge dried material from the basket 8, fluid will be admitted to the lower end of the cylinder 20, thereby forcing up the piston 19 and lifting the valve 18 and oke 16. lower t e valve through the connecting rod When it is desired to again 12 the cogitrol valve 29 will be turned so as to admit fluid to the upper end of the cylinder 20 and allow the discharge or exhaust of the fluid from the lower side of the piston 19, thereby forcing the piston and lowering the valve 12. r

I provide the yoke 16 with considerable clearance between its face and the stem 13 of the. valve so that if the basket oscillates when rotating, it will be free to strike the wooden buffer ring 35 located in the lower end of the casing 9, thus preventingspringing of the power shaft 7 While I have shown and described only the scope of my invention as defined in the appended claims.

1. In a centrifugal drier, the comblnation with a basket having a centrally arranged discharge opening in its bottom wall,

and a vertically movable valve for closing said opening and adapted to be lifted to permit the discharge of materlal through said opening, of an operating rod having an operative connection with the upper en of said .valve, said connection belng adapt ed to permit free rotation and llmited osclllation of said valve relative to said rod, and power means for reciprocating said rod to open and close said valve.

2. In a centrifugal drier, the combination with a basket havinga centrally arranged discharge opening in its bottom wall, and a bell-shaped vertically movable valve for closing said opening andada ted to be lifted to permit the dischargeo materlal through said opening, of a pair of flanges on the upper end of the stem of said valve,v

a yoke loosely mounted between said flanges, said yoke being adapted to perm1t free rotation and a limited horizontal osc1llat1on of said valve stem relative to said yoke, an operating rod connected to said yoke, and

power means for reciprocating said rod to open and close said valve.

3. In a centrifugal drier, the comblnatlon with a basket having a centrally arranged dischar e opening in its bottom wall, and

' a bell-s aped vertically movable valve for closing said opening and adapted to be lifted to permit the discharge of material through said opening, of a pair of flanges on the uper end of the stem of said valve, a yoke ibosel mounted between said flanges, said yoke eing adapted to permit free rotation and a limitedhorizontal' oscillation of sald valve stem relative to said yoke, an operating rod connected to said yoke, means for uiding the lower end of said rod, and a fluid operated cylinder having its piston connected to the upper end of said rod for reciprocating said rod to open and close said valve. 0 a

4. The combination with a centrifugal drier comprising a housing, a vertical shaft having its upper end 'journaled in said-housing, a basket securedto the lower end of said shaft having a'centrally. arranged dis charge opening in its bottom'wall, and a v a valve slidably mounted on said shaft for closing said openingand adapted to be lifted to permit the discharge of the dried material through said,-

opening, of a pair of flanges on the upper end; of said valve,

a.yoke loosely mounted said yoke, an operating rod connected to said yoke, means for'g'uiding'the lowerend of said rod, and a fluid operated cylinder mounted on said housing and having its piston connected to the upper end of said rod for reciprocating said rod to open and close said valve.

5. The :combination with a centrifugal drier comprising a housing, a vertical shaft having its upper end journaled in said housing, a basket secured to the lower end of said "shaft having acentrally arranged discharge opening in its bottom wall, and a'bell shaped vertically movable valve slidably mounted on said shaft for closing said opening and adapted to be lifted to permit the discharge of the dried material through said opening, a valve stem extending upwardly from said valve, of a pair of flan es on the upper end of said valve stem, a yo e mounted between said flanges, an operating rod connected to said yoke, means for guidin the lower end of said yoke, a. fluid operate cylinder mounted on said ing its piston connected to said rod for reciprocating said rod to 0 en and close said valve, means for controlllng the operation of said cylinder, and means for cushioning the stroke of said piston at the termination of its travel so as to prevent the jarring of said .valve.

o. The combination with a centrifugal drier comprising a housing, a vertical shaft having its upper end 'ournaled in said housing, a basket secured to the lower end of said shaft having a centrally arranged discharge opening 1n its bottom wall, and a bell shaped vertically movable valve slidably mounted on said shaft for closing said opening and adapted to be lifted to permit the discharge of the dried material through said opening, a hollow sleeve-like valve stem extending upwardly from said valve and around said vertical shaft, of a pair of flanges on the u per end of said valve stem, a yoke mounte between said flanges, an operating rod connected to said yoke, means for guiding the lower end of said yoke, power means mounted on said housing and connected to said rod for reciprocating said rod to open and close saidvalve, means for controlling the operation of said power means and means for preventing the jarring of said valve.

7. The combination with a centrifugal drier comprising a housing, a vertical shaft having its upper end 'ournaled in said housing, a basket secure to the lower end of said shaft having a centrally arranged discharge opening in its bottom wall, and a bell shaped verticall' movable valve slidably mounted on sai shaft for closing said the upper end of o ening and adapted to be lifted to permit t e discharge of the dried material through said 0 ening, a hollow sleeve-like valve stem exten ing upwardly from said valve and around said vertical shaft, of a pair of flanges on the upper end of said valve stem,

a ioke mounted between said flanges, saidv yO e being loosely fitted around said valve stem so as to permit free rotation and a limited oscillation of said valve relative to said yoke, an operating rod connected to said yoke a guide-bar secured to said housing, a roller journaled on said yoke and adapted to ride on said bar when said valve is moved to open or close said discharge opening, and power means mounted on said houslng and connected to said rod for reciprocating said rod to open and close said valve.

'si ed m name.

gn y GEORGE DAVIS.

In testimony whereof, I have hereunto 0 

